| Patents for John C. Chapman |
Patents 1 -
10
of 10
      |
| Picture | Number | Date | Patentee | Title |
 | 37,332 | Jan. 06, 1863 | J.C. Chapman | Improvement in machines for drawing bolts and spikes |
| | 37,384 | Jan. 13, 1863 | J.C. Chapman | Boring and Squaring Off Cylinders |
 | 42,560 | May 03, 1864 | J.C. Chapman | Ratchet Drill |
 | 50,748 | Oct. 31, 1865 | J.C. Chapman, D.C. Stillson | Improved Tool for Turning Gas-Pipe, etc. |
| | 60,138 | Dec. 04, 1866 | J.C. Chapman | Lathe Chuck |
| | 63,992 | Apr. 23, 1867 | J.C. Chapman | Boring Tool |
 | 94,241 | Aug. 31, 1869 | J.C. Chapman, A. Robes | Improvement in Pipe-Wrench and Pipe-Cutter |
 | 150,395 | May 05, 1874 | J.C. Chapman | Slotting and Planing Tools |
 | 154,455 | Aug. 25, 1874 | W.H. Hoffman, J.C. Chapman | Improvement in self-oiling journal-boxes and hangers |
 | 157,373 | Dec. 01, 1874 | J.C. Chapman | Improvement in hand drilling-machines |
